1 /* 2 * Raspberry Pi emulation (c) 2012 Gregory Estrade 3 * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous 4 * 5 * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft 6 * Written by Andrew Baumann 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2 or later. 9 * See the COPYING file in the top-level directory. 10 */ 11 12 #ifndef BCM2835_FB_H 13 #define BCM2835_FB_H 14 15 #include "hw/sysbus.h" 16 #include "ui/console.h" 17 #include "qom/object.h" 18 19 #define UPPER_RAM_BASE 0x40000000 20 21 #define TYPE_BCM2835_FB "bcm2835-fb" 22 OBJECT_DECLARE_SIMPLE_TYPE(BCM2835FBState, BCM2835_FB) 23 24 /* 25 * Configuration information about the fb which the guest can program 26 * via the mailbox property interface. 27 */ 28 typedef struct { 29 uint32_t xres, yres; 30 uint32_t xres_virtual, yres_virtual; 31 uint32_t xoffset, yoffset; 32 uint32_t bpp; 33 uint32_t base; 34 uint32_t pixo; 35 uint32_t alpha; 36 } BCM2835FBConfig; 37 38 struct BCM2835FBState { 39 /*< private >*/ 40 SysBusDevice busdev; 41 /*< public >*/ 42 43 uint32_t vcram_base, vcram_size; 44 MemoryRegion *dma_mr; 45 AddressSpace dma_as; 46 MemoryRegion iomem; 47 MemoryRegionSection fbsection; 48 QemuConsole *con; 49 qemu_irq mbox_irq; 50 51 bool lock, invalidate, pending; 52 53 BCM2835FBConfig config; 54 BCM2835FBConfig initial_config; 55 }; 56 57 void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig); 58 59 /** 60 * bcm2835_fb_get_pitch: return number of bytes per line of the framebuffer 61 * @config: configuration info for the framebuffer 62 * 63 * Return the number of bytes per line of the framebuffer, ie the number 64 * that must be added to a pixel address to get the address of the pixel 65 * directly below it on screen. 66 */ 67 static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config) 68 { 69 uint32_t xres = MAX(config->xres, config->xres_virtual); 70 return xres * (config->bpp >> 3); 71 } 72 73 /** 74 * bcm2835_fb_get_size: return total size of framebuffer in bytes 75 * @config: configuration info for the framebuffer 76 */ 77 static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config) 78 { 79 uint32_t yres = MAX(config->yres, config->yres_virtual); 80 return yres * bcm2835_fb_get_pitch(config); 81 } 82 83 /** 84 * bcm2835_fb_validate_config: check provided config 85 * 86 * Validates the configuration information provided by the guest and 87 * adjusts it if necessary. 88 */ 89 void bcm2835_fb_validate_config(BCM2835FBConfig *config); 90 91 #endif 92